Dual Alpine Type R R‑W12D4 12" SUV / Hatchback Ported Subwoofer Box Plans
Subwoofer Box Plans for Alpine Type R R‑W12D4 12" – Dual Ported Enclosure
Build a powerful, clean‑sounding ported enclosure for two Alpine Type R R‑W12D4 12" subwoofers with these precision‑engineered SUV/Hatchback‑optimized subwoofer box plans. Designed for strong low‑end extension and excellent cabin gain, this enclosure delivers deep bass, tight response, and reliable daily performance from Alpine’s legendary Type R series.
Save Money — Build It Yourself
Stop wasting materials and guessing on dimensions. These DIY subwoofer box plans make it simple to build a professional‑grade enclosure at home, perfect for anyone wanting big bass without paying custom‑shop prices.
What’s Included
- Downloadable ZIP file
- Multiple 3D rendering images
- Detailed spec sheet with subwoofer & enclosure specs
- Professional optimized cut sheet with parts list
- Precision‑designed ported enclosure layout
Designed For
Dual Alpine Type R R‑W12D4 12" Subwoofers – SUV/Hatchback Application
- Woofer Type: (2) Alpine Type R R‑W12D4
- Woofer Size: 12"
- Outside Dimensions: 14"H × 32"W × 24"D
- Tuning: 33Hz
- Performance Notes: Optimized for SUV/Hatchback cabin gain, delivering deep lows, clean output, and strong daily performance
May work for other 12" woofers — user discretion advised.
Why These Plans Perform
- Optimized specifically for dual Alpine Type R R‑W12D4 12" subs
- Designed for deep, accurate bass with strong low‑frequency extension
- SUV/Hatchback‑tuned for maximum cabin gain and output
- Smooth, predictable response thanks to proper port tuning
- Ideal for daily setups needing clean, reliable performance
- Eliminates trial‑and‑error and wasted materials